FAQ
I am having a problem starting my hadoop. i setup my for my single-node
cluster. please help me to solve this out!!!!

hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
starting namenode, logging to
/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
/usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
Permission denied
head: cannot open
`/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out' for
reading: No such file or directory
localhost: starting datanode, logging to
/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
Permission denied
localhost: head: cannot open
`/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out' for
reading: No such file or directory
localhost: starting secondarynamenode, logging to
/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
Permission denied
localhost: head: cannot open
`/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
for reading: No such file or directory
starting jobtracker, logging to
/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
/usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
Permission denied
head: cannot open
`/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out' for
reading: No such file or directory
localhost: starting tasktracker, logging to
/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
Permission denied
localhost: head: cannot open
`/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out' for
reading: No such file or directory

Search Discussions

  • Dhruv Kumar at Jun 30, 2011 at 7:21 pm
    It is a permission issue. Are you sure that the account "hadoop" has read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open

    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out' for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out' for
    reading: No such file or directory
  • Paul Rimba at Jun 30, 2011 at 11:23 pm
    sudo chown -R hadoop:hadoop /usr/local/hadoop.
    That will give the directory ownership over to your hadoop account.
    On Fri, Jul 1, 2011 at 5:07 AM, Dhruv Kumar wrote:

    It is a permission issue. Are you sure that the account "hadoop" has read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open

    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out' for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out' for
    reading: No such file or directory
  • Mitra Kaseebhotla at Jun 30, 2011 at 11:27 pm
    Not to divert the question here. I would like to know how we should manage
    the cluster users (I am a newbie)? insead of having one user(hadoop) creds
    shared?

    Thanks
    Mitra.
    On Thu, Jun 30, 2011 at 4:23 PM, Paul Rimba wrote:

    sudo chown -R hadoop:hadoop /usr/local/hadoop.
    That will give the directory ownership over to your hadoop account.
    On Fri, Jul 1, 2011 at 5:07 AM, Dhruv Kumar wrote:

    It is a permission issue. Are you sure that the account "hadoop" has read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out' for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out' for
    reading: No such file or directory


    --
    ________________________________________

    To Understand Recursion,
    You must first Understand Recursion
    ________________________________________
  • Shahnawaz Saifi at Jul 1, 2011 at 7:08 am
    You can create multiple users on Cluster because it follows LSM (Linux
    security model). But Hadoop related process NN, DN, JT, TT need to be
    started with one user e.g. hadoop.

    Thanks,
    Shah
    On Fri, Jul 1, 2011 at 4:57 AM, Mitra Kaseebhotla wrote:

    Not to divert the question here. I would like to know how we should manage
    the cluster users (I am a newbie)? insead of having one user(hadoop) creds
    shared?

    Thanks
    Mitra.
    On Thu, Jun 30, 2011 at 4:23 PM, Paul Rimba wrote:

    sudo chown -R hadoop:hadoop /usr/local/hadoop.
    That will give the directory ownership over to your hadoop account.
    On Fri, Jul 1, 2011 at 5:07 AM, Dhruv Kumar wrote:

    It is a permission issue. Are you sure that the account "hadoop" has
    read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just
    follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my
    single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out'
    for
    reading: No such file or directory


    --
    ________________________________________

    To Understand Recursion,
    You must first Understand Recursion
    ________________________________________
  • Harsh J at Jul 1, 2011 at 8:11 am
    Shahnawaz,

    If required, the MR and the HDFS processes can be user separated too.
    Its generally a good thing to do in practice (so that MR daemons and
    user don't get "superuser" access to HDFS files).

    FWIW, I usually flip open the cluster setup guide on ccp.cloudera.com
    and everything comes up right when I follow that (its got footnotes
    too, yay!).

    But yes, managing local permissions is quite a pain to do manually,
    and I believe the new bigtop incubator entrant is gonna help in
    setting up clusters painlessly as we go forward.
    On Fri, Jul 1, 2011 at 12:35 PM, Shahnawaz Saifi wrote:
    You can create multiple users on Cluster because it follows LSM (Linux
    security model). But Hadoop related process NN, DN, JT, TT need to be
    started with one user e.g. hadoop.

    Thanks,
    Shah

    On Fri, Jul 1, 2011 at 4:57 AM, Mitra Kaseebhotla <
    mitra.kaseebhotla@gmail.com> wrote:
    Not to divert the question here. I would like to know how we should manage
    the cluster users (I am a newbie)? insead of having one user(hadoop) creds
    shared?

    Thanks
    Mitra.
    On Thu, Jun 30, 2011 at 4:23 PM, Paul Rimba wrote:

    sudo chown -R hadoop:hadoop /usr/local/hadoop.
    That will give the directory ownership over to your hadoop account.

    On Fri, Jul 1, 2011 at 5:07 AM, Dhruv Kumar <dkumar@ecs.umass.edu>
    wrote:
    It is a permission issue. Are you sure that the account "hadoop" has
    read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just
    follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my
    single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out'
    for
    reading: No such file or directory


    --
    ________________________________________

    To Understand Recursion,
    You must first Understand Recursion
    ________________________________________


    --
    Harsh J
  • Shahnawaz Saifi at Jul 1, 2011 at 9:01 am
    Harsh,

    Thanks for sharing. Recently, I ran into multiple user issue on cluster
    because all the time we were using same user to run MRs so I found below
    work around for it.

    I am curious to know, How do we separate HDFS processes for users?


    On Fri, Jul 1, 2011 at 1:39 PM, Harsh J wrote:

    Shahnawaz,

    If required, the MR and the HDFS processes can be user separated too.
    Its generally a good thing to do in practice (so that MR daemons and
    user don't get "superuser" access to HDFS files).

    FWIW, I usually flip open the cluster setup guide on ccp.cloudera.com
    and everything comes up right when I follow that (its got footnotes
    too, yay!).

    But yes, managing local permissions is quite a pain to do manually,
    and I believe the new bigtop incubator entrant is gonna help in
    setting up clusters painlessly as we go forward.
    On Fri, Jul 1, 2011 at 12:35 PM, Shahnawaz Saifi wrote:
    You can create multiple users on Cluster because it follows LSM (Linux
    security model). But Hadoop related process NN, DN, JT, TT need to be
    started with one user e.g. hadoop.

    Thanks,
    Shah

    On Fri, Jul 1, 2011 at 4:57 AM, Mitra Kaseebhotla <
    mitra.kaseebhotla@gmail.com> wrote:
    Not to divert the question here. I would like to know how we should
    manage
    the cluster users (I am a newbie)? insead of having one user(hadoop)
    creds
    shared?

    Thanks
    Mitra.
    On Thu, Jun 30, 2011 at 4:23 PM, Paul Rimba wrote:

    sudo chown -R hadoop:hadoop /usr/local/hadoop.
    That will give the directory ownership over to your hadoop account.

    On Fri, Jul 1, 2011 at 5:07 AM, Dhruv Kumar <dkumar@ecs.umass.edu>
    wrote:
    It is a permission issue. Are you sure that the account "hadoop" has
    read
    and write access to /usr/local/* directories?

    The installation of Hadoop has always been effortless for me. Just
    follow
    the instructions step by step given on:
    http://hadoop.apache.org/common/docs/stable/single_node_setup.html




    On Thu, Jun 30, 2011 at 11:08 AM, Ashish Tamrakar
    wrote:
    I am having a problem starting my hadoop. i setup my for my
    single-node
    cluster. please help me to solve this out!!!!

    hadoop@ashishpc:~$ /usr/local/hadoop/bin/start-all.sh
    starting namenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-namenode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting datanode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-datanode-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting secondarynamenode, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-secondarynamenode-ashishpc.out'
    for reading: No such file or directory
    starting jobtracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out
    /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out:
    Permission denied
    head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-jobtracker-ashishpc.out'
    for
    reading: No such file or directory
    localhost: starting tasktracker, logging to
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out
    localhost: /usr/local/hadoop/bin/hadoop-daemon.sh: line 117:
    /usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out:
    Permission denied
    localhost: head: cannot open
    `/usr/local/hadoop/bin/../logs/hadoop-hadoop-tasktracker-ashishpc.out'
    for
    reading: No such file or directory


    --
    ________________________________________

    To Understand Recursion,
    You must first Understand Recursion
    ________________________________________


    --
    Harsh J


    --
    Thanks,
    Shah

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